Add strlen and strnlen unit tests

test/val/lib_common_strlen.c

@@ -0,0 +1,22 @@
+#include <string.h>
+#include "unittest.h"
+
+#define SHORT_STR "abcdefghijklmnopqrstuvwxyz"
+
+#define MID_STR_LEN 700 /* Two pages and something */
+TEST
+{
+    char *src;
+    int i;
+
+    /* Long enough for the whole string */
+    ASSERT_IsTrue(strlen("") == 0, "strlen(\"\") != 0");
+    ASSERT_IsTrue(strlen(SHORT_STR) == 26, "strlen(\""SHORT_STR"\") != 26");
+
+    src = malloc(MID_STR_LEN+1);
+    ASSERT_IsTrue(src != NULL, "Could not allocate source string");
+    memset(src, 'a', MID_STR_LEN-1);
+    src[MID_STR_LEN] = '\0';
+    ASSERT_IsTrue(strlen(src) == MID_STR_LEN, "strlen(\"700 chars\") != 700");
+}
+ENDTEST